Check the listing for details. 2Pcs M16*1.5 Hex Head Pipe Fitting Plug Socket Plug w Sealing Ring for Pipe Ends. Condition: New. Listed at 16.24 USD. These threaded male plugs are used to seal holes in machinery, fittings, or pipes to prevent leakage of air, steam, gas, water, oil and fluids under pressure. These plugs are also great for plugging in intake manifold water ports, water pump ports, engine plug holes, and more.Specification:Color: Silver ToneMaterial: 45# Steel, Zinc PlatedThread Size: M16*1.5mmInternal Hex Width: 8mm / 0.31 inchOverall Height: 22 x 17mm / 0.87 x 0.67 inch (D*H)Packing List: 2 x Pipe PlugAdvantage:Made from 45# Steel for good strength and corrosion resistance. The internal hex head design is convenient for you to install.Instruction:The sealing ring provides a tight sealing performance, easy to install, countersunk hex head increases leverage, used with a wrench.